circulatory system

• red blood cell


  carry oxygen
• red blood cell adaption

  no nucleus
• white blood cell


  defends against pathogens
• types of white blood cells

  1. phagocytes (engulfs pathogen)
  2. antitoxins (neutralises)
  3. antibody (kill)
• platelets 


  blood clotting (forms scabs)
• plasma

  • waste products (urea)
  • blood
  • co2
  • amino acids
  • glucose
• coronary artery


  delivers deoxygenated blood to the heart
• veins


  deliver blood into the heart
• vena cava


  deoxygenated blood into heart
• arteries 


  carry blood away from the heart
• pulmonary artery


  deoxygenated blood to the lungs
• pulmonary vein 


  oxygenated blood into heart
• aorta


  oxygenated to body
• arteries

  • small lumen
  • elastic fibre
• veins

  • large lumen
  • valves
  • elastic fibre
• capillaries

  • small
  • one cell thick
  • gas exchange